1. Department of Gastroenterology, Shanghai General Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
2. Shanghai Key Laboratory of Pancreatic Disease, Institute of Pancreatic Disease; Shanghai Jiao Tong University School of Medicine; Shanghai China
3. Department of Gastroenterology, Shanghai Tenth People's Hospital; Tongji University School of Medicine; Shanghai China
4. State Key Laboratory of Oncogenes and Related Genes, Stem Cell Research Centre, Ren Ji Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China